hash.hpp

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// -----------------------------------------------------------------------------------------------------
// Copyright (c) 2022 deCODE Genetics
// Copyright (c) 2006-2020, Knut Reinert & Freie Universität Berlin
// Copyright (c) 2016-2020, Knut Reinert & MPI für molekulare Genetik
// This file may be used, modified and/or redistributed under the terms of the 3-clause BSD-License
// shipped with this file and also available at: https://github.com/biocpp/biocpp-core/blob/main/LICENSE.md
// -----------------------------------------------------------------------------------------------------
 
#pragma once
 
#include <bio/alphabet/concept.hpp>
 
namespace std
{
template <typename alphabet_t>
    requires bio::alphabet::semialphabet<alphabet_t>
struct hash<alphabet_t>
{
    size_t operator()(alphabet_t const character) const noexcept { return bio::alphabet::to_rank(character); }
};
 
} // namespace std